899998641 has 8 divisors (see below), whose sum is σ = 1333331360. Its totient is φ = 599999076.

The previous prime is 899998639. The next prime is 899998661. The reversal of 899998641 is 146899998.

It is not a de Polignac number, because 899998641 - 2¹ = 899998639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (899998601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16666615 + ... + 16666668.

It is an arithmetic number, because the mean of its divisors is an integer number (166666420).

Almost surely, 2^899998641 is an apocalyptic number.

It is an amenable number.

899998641 is a deficient number, since it is larger than the sum of its proper divisors (433332719).

899998641 is a wasteful number, since it uses less digits than its factorization.

899998641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33333292 (or 33333286 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The square root of 899998641 is about 29999.9773499914. The cubic root of 899998641 is about 965.4888986424.

The spelling of 899998641 in words is "eight hundred ninety-nine million, nine hundred ninety-eight thousand, six hundred forty-one".